Mechanical variable power and speed gear for transmission.



A. SUNDH. MECHANICAL VARIABLE POWER AND SPEED GEAR FOR TRANSMISSION.

APPLTGATION FILED SEPT-1G, 1909. 1,081,636. Patented Dec. 16, 1913.

2 SHEETS-SHEET l.

A. SUNDH. MECHANICAL VARIABLE POWER AND SPEED GEAR FOR TRANSMISSION.

APPLICATION FILED SEPT. 16, 1909.

Patented Dec. 16, 19-13.

2 SHEETS-SHEET 2.

I HMLH a k 'llllu l Widmaoow 5 z W AVAILABLE COPY UNITED STATES PATENTOFFICE.

AUGUST SUND H, OF YONKERS, NEW YORK OF JERSEY CITY, NEW JERSEY,

MECHANICAL VARIABLE POWER AND SPEED GEAR FOR TRANSMISSION. l

, ASSIGNOR T OTIS ELEVATOR COMPANY,

A CORPORATION OF NEW JERSEY.

1,081,636, Specification of Letters Patent.

Application filed September 16, 1909. Serial No. 517,962.

To all whom it may concern Beit known that I, Aroi's'r St'xnn, a citizen0f the United States. residing at Yonkers, in the county of \Vestchesterand State of New York, have invented a new and useful Improvement inMechanical Variable Power and Speed G'ars for 'lransmission, of whichthe following is a specification.

. My invention relates to mechanism for transmitting' fiower from amotor, or other source of power, to mechanism to be driven "andcomprises means for var -inc the speed of the driven mechanism at will.

An object of the invention is to provide a sinlple. practical andctl'ective device. of the character above indicated. in which the speedof the driven mechanism may be readily varied through any desired degreeand is under the complete control of the operator.

Other objects of the invention and the exact nature thereof. will appearhereinafter, the scope of the invention being dcfined in the appendedclaims in which are set forth the novel combinations of elements.

Referring to the drawings. Figure l is a sectional elevation view of aconstruction embodying the principles of my invention. Fig. 2 is asectional view of the same as 30 indicated by the section line 2, 2 ofFig", 1, Fig. 3 is a detailed view showing the brake mechanism. Fig. 4is a detailed view of a portion of the reversing clutch mechanism.

herein shown as inclosed iii the casing, 1 mounted on a base or abed-plate 2. The

casing may contain a lubricating oil 23 which servts to. keep all of theiiiovin; parts well luln'icated and thereby secures a smooth operationof the mechanism. Power is supplied from any suitable source, as forexample an electric motor 4: having a drive shaft \Vithin the casing isa hollow drive shaft (3 coupled to or formed integral with Q the motorshaft. 5. Mounted on the drive shaft are a plurality of (mcentries, A; Band C. Vithin the hollow drive shaft. 6 is a longitudinally movableadjusting shaft 7 which is formed with a pair of oppositely alisposedslots'8 and 9 for each eccentric. The inner surfaces of these slots areinclined and parallel so as to form diagonal Webs 10 extending acrossthe adjusting shaft. Each the eccentrics comprises eccentric blocks 1.].and 12 which together form a disk which is mounted on the drive shaft.The sections it and 12 are formed with rectangular rccess-es 15; to fitthe square bearing surface ll of the drive shaft. The recesses 13 are ofsuch depth as to permit a lateral adjustment of the eccentrics on thedrive shaft. The sections 11 and 12 of the eccentric are formed witharms 1.) and It; respw-tively. extending into the recesses S and ti andpro vided with anti-friction rollers 17 hearing against. the web It).The shaft (5 is provided with shoulders 18 which preventlongitudinal-movement of the eccentrics on the drive shaft. The recessesH and t for the ditl'erent eccentrics are in dillerent. planes. thel'tttHrstS for the. eccentric being 120 dec'rees in advance of those foreccentric l and those for eccentric libeing' lQtl degrees in advance ofthose for eccentric t'. The eccentric blocks 1] and 12 are securedtt1;ctlici'l1 \tlto eccentric straps i the latter being made insections. secured together by bolts 21. \Vith the parts in the positionshown. the eccentrics are concentric with the drive shaft,

The following means are provided for moving the adjusting shaft 7longitlulinally to adjust the eccentrics: Journaled in the end of thecasino 1 is a shaft to the inner end of which is keyed a pinion 23meshing with ear wheels 21 and .35. the latter being keyed to shafts 2tand 27 respectively. The shafts 2t; and 527 :11? also journalcd in thecasing and in brackets 28 and 29 respectively. The end of the shaft 7 isreduced to form a stem 30 on which is loosely mounted a plate 3t formedwith threaded'openings to receive the threarhrd ends of the shafts 26and 27. The disk 32 is keyed to the outer end of the stem 30.hill-bearings 33 are placed between the plate 31 and the disk 32 andalso l)tt\\ttll the plate 31 and the bodyportion of the shaft 7 toreceive the end thrust of the shaft. Secured to the outer end of theshaft 252 is a hand lover or wheel Ill, behind which is located a dial35 to indicate the position to which the hand lever 31 is adjusted. Withthe parts in the position shown, the adjnstin shaft. 7 is in its extremeright hand position and the. eccentrics A, B and C are concentric withthodrive shaft. By rotating the hand lever 34 in the righthand directionmotion is imparted to pinion 22 and the gears 24 and 25. the latterrotating the shafts 2G and 27 and moving the plate 31 and with it theshaft 7, to the Patented Dec. 1 (i, 1913. i

Within the casing are stand 'ardsziil and 42' in the up er ends of whichis shaft'43 para lot with the shaft 40. Pivoted on the shaft 43 arelevers 44,-

7 each of which is connected by a rod or pitman 45 to an eccentric strap20. Iivnted to 15 each lever 44 on opposite sides ofits pivot are pawls46 and 47, adapted to engage a ratchet wheel 48 keyed to the shaft 40.Springs -19 bearing against the pawls serve to hold themagainst theratchet wheel and permit them to ride over the ratchet teeth in onedirection. A rock shaft 50 is journaled in the standards 41 and 42 belowthe shaft 43. Keyed to this rock shaft are plates 51 extending from thesaid shaft and provided 25 with-elongated openin s 52 through which theshaft 43 passes. achplate 51 carries pins 53 and 54 adjacent to thepaw-1546 and 47 respectively; A crank arm 55 issccurcd to the e ad ofthe rock shaft 50 and is con nected-through a link 56 to mechanism for rI bedescribed. When the link is moved down llw lld, the shaft, 50 rocksthe plates 5-1-to the left'fas viewed ,infFig. 2' and the pins 53 and{i4 lift-the pawls 46 and 47 respeetively,

of co'n'ta'ct'with the ratchet wheels.

. -friction'clhtch K is provided for com 1 ,n ectiiilz'the drive shaft 6to the driven "shaft -40," independen'tly,of the pawl' and. ratchet l0mechanism. '1 his'-t-lutch comprises a clutch member 60-loosely"mounted;on the shaft 6 and a elutch-member61 movablelongitudinally of the shaft :but held against rotation independently ofthe shaft. lVithin the hol- 46 low shaft 6 is a cup-shaped member 62having pins 63 projecting through slots 64 in the shaft and extendinginto the clutch member 61. A bolt 65 extends loosely through thecup'shaped member 62 and is provided 50 at. its outer end with a head66. The inner end of the bolt 65 is threaded into the end of theadjusting shaft- 7. A washer 67 mounted on the bolt 65 bears against ashoulder formed on the bolt, being held in 6 such position by a coilspring 68 between said w asher and theend of the shaft 7.. A bell cranklever 70 pivoted at 71 has one arm connected to the link 56. The otherarm of said lever is. bifurcated to'straddlc 60 a collar 72 mounted onthe shaft 6 and slidable longitudinally thereof. The collar 72 isprovided with lugs 73 which extend within the hollow shaft. hen theadjusting shaft.7 moves to the 6 left, the bolt 65 slides through thecup 62 *ordinary expansion clutch of well known 'k cyed'to the saidshaft.

operating the mek shaft 50 as will presently.

with a pinion 86' keyed to a shaft 87 parallelwith the shaft 40. Theclutch member, 82

,with a sprocket wheel .88

until the washer 67 is brought into contact with said cap. The continuedmovement of the shaft -7 to the left moves the clutch member 61 intofrictional contact with the member 60;'-yieldin gpressure beingtransmitted 70 from the shaft 7 throu hthe-springbB to the clutch member61. The continued move; ment of the'shaft 7 tosthe-left compremes thespring 68 and increases the pressure-between the clutch members, ,Atsubstantially 75 the same time that therlutah-member comes in contactwith the 'member 60, the end of the shaft 7 engages the lugs 73 on thecollar 7 2 and operates through the latter to rotate the bell cranklever 70. The link 30 56 is thereby moved downward and operates asbefore noted to lift the pawls from the ratchet wheels.

The reversing clutch mechanism will now be described: This mechanismcomprises two 35 clutches L and M. The clutch L consists of an outermember loosely mounted-on the shaft 40 and aninnermember 81 keyed to theshaft This clutch is preferably an form and itInced not be described indetail. The clutch M. co'n'ipris'es-fan outer memberi 82 loose on theshaft 40 and an inner member, 83

Between the twq clutches is'a collar- 84 splined on the shaft 95 andslidable lo'ngi'tildinally thereof. This collar-is connected by links 85with the inner members of the clutches. The clutch member is providedwith gear teeth in mesh has secured thereto or ,formedin'tegral thereconn'ectedby a sprocket chain 89 -with a pinion 90 secured to the shaft87. A'rock shaft 91 journalod in the casing 1, (see'Fig 4) has anoperating band lever 92 secured to its outer end. Keyed to the inner endof the shaft 91 is a vertical lever 93 formed with a ring 94 surroundingthe collar 84 and provided with lugs 95 extending into an annular recessformed in the collar.

The brakemechanism comprises a brake pulley 96 keyed to the shaft 87 andbrake shoes v97 pivoted at 98 to brake levers 99, the latter havingstationary pivots 100. The upper ends of the brake levers are connectedby links 101 to a block 1 2 slidable on a verticalrod 103. The latterispivoted at its upger end to the outer end of a lever 104 whic is ivotedat 105 to the upper end of a stander 106 in which the shafts 40 and .87are journaled. Coil s rings 107 and 108 103 between the are mountedonthe ro block 102 and washers carried by-said rod. thereby forming-jayieldin connection between the rod-1 03 and t e brake levers. Thelever'104 is formed with a cam 108 cooperating with the vertical lever93. With the latter in its central position as shown, no

an anti-frictionroller 110 carried at the upper end of the 'lever 93 isheld in a recess formed at the center of the cam 108.

With the clutch mechanism in the position shown, he members of bothreversing clutches are isconnected so that no motion is transmitted fromthe shaft 40 to the shaft 87. The lever 93 in engagement with the cam108 also holds the lever 101 in its upper position so that the brakeshoes are held against the brake pulley. If the reversing clutch lever92 is moved for example to the right, the lever 93 will be moved to theright of thecain 108, permitting the lever 104 to drop, therebyreleasing the brake. This movement of the lever 93 to 112 or othersuitable gearing to the mecha n'isnrto be driven. The movement of thelever 9% to the left from central position operates to release the brakeand connect the members of the clutch L so that motion is transmittedfrom the shaft 40 through the member and pinion 86 thereby rotating theshaft 87 in the reverse direction.

The operation will be understood from the following, taken in connectionwith the foregoingdescription: Assumin the parts to be in the positionshown and t rat the motor 4 is running at a constant speed, the driveshaft 6 will rotate, carrying with it the eccentrics which are rotatedfreely within the eccentric straps 20, no motion being transmitted tothe driven shaft 40. To operate the driven mechanism, the reversingclutch lever 92 is moved from its central position either to the rightor to the left, depending upon the direction in which it is desired torotate the shaft 87. The adjusting lever 34 is then rotated in a righthand direction to move the adjusting shaft; 7 to the left, therebyadjusting the eccentrics.

The latter now operate to reciprocate the le vers 414; and thus operatethe pawl and ratchet mechanism. As the outer end of the lever 44, Fig.2, is moved downward, the pawl 46 rotates the ratchet wheel 48 in thedirection indicated by the arrow, the lower pawl 47 at the same timeriding upward over the ratchet teeth. As the lever 4st moves in thereverse direction, the pawl 17 imparts an additional movement to theratchet wheel while the pawl 46 rides upward bverthe ratchet teeth. Theangle through which the ratchet wheel is rotated during eachreciprocation of the lever 44 depends upon the,length of stroketransmitted from the eccentric through the rod 15. Owing to the relativepositions of the eccentrics, the pawls controlled by said eccentricswill operate successively, a pawl being brought into operation for eachadvance of 60 degrees in the rotation of the motor shaft. It will beseen therefore that the rotation of the shaft 40 is continuous andsubstantially uniform. As the shaft 7 approaches its limit of movementto the left, the clutch K is operated as before described to connect theclutch members 60 and 61. The clutch member 60. is formed with sprocketteeth 115 and connected through a sprocket chain 116 with a sprocketwheel 11?, keyed to the shaft 40 so that when the clutch K is operated,the motor is connected to the shaft 40 independently of the pawl andratchet mechanism. The parts are so proportioned that the shaft 40 isbrought to substantially full speed before this direct connection iseflected. As the clutch K is operated, the bell crank lever 70 is alsooperated as before described and effects a rotation of the shaft 50,thereby disconnecting the pawls from the ratchet wheels. The

driven mechanism may be stopped and again started or reversed by meansof the lever 92, if desired. The shaft 7 may be ad justed and retainedin any desired intermediate position, depending upon the speed at whichit is desired to operate the driven mechanism. Ball bearings 118, 119and 120 are provided to take up the end thrust of the drive shaft.

Various changes in the details of construction and arrangements of partsmight obviously be made by those skilled in the art without departingfrom the spirit and scope of the invention. I desire therefore not to belimited to the exact construction herein disclosed.

What I claim,as new and desire to secure by. Letters Patent of theUnited States, is

1. The combination with a drive shaft, of a driven member, pawl andratchet mechanism between said shaft and driven member, a clutch havingits members connected to the drive shaft and the driven memberrespectively, a clutch operating device, means for holding the pawl andratchet mechanism in inoperative position, and a connection between saidmeans and said clutch operating device.

2. The combination with a drive shaft, of a driven shaft, a plurality ofpawl and ratchet devices, a clutch connected to the drive shaft, :1connection between the clutch and the driven shaft, a clutch operatingdevice, means for lifting the pawls out of operative position connectedto said clutch operating device.

3. The conmination with a drive shaft and driven mechanism, of awl andratchet devices for operating sai( mechanism, ec-' centrics mounted onthe drive shaft and connected to the pawl and ratchet devices, a

'. .7 4 The combination and pawl from the drive connection between theshafts comprising a friction clutch having its members operaadjustingthe eccentrics and operating the clutch, and a device connected to saidmeans for rendering the pawl and ratchet devices inoperative.

of a drive shaft, a

driven shaft ratchet. wheel connected to a the driven shaft, a pawl, alever carrlying ever said" pawl, means for operating the shaft, adriving clutch, means for o eratin the clutch, and mechanism operate bysaid clutch operating means for holding the lever. and pawl out ofoperative position and stationary wl' ile said shafts are'connectedthrough said clutch.

The combination of a driving member, an eccentric connected thereto, aratchet wheel, a shaft on which said wheel. is mounted, a lever, a pawlconnected to the lever and operable to imparta forward movement to theratchet wheel when the lever is rotated in one direction, "a second pawlconnected to the lever and operable to im art a forward movement to theratchet w eel when the lever is rotated in the reverse di-' rection, aconnection between the eccentric and the lever for reciprocating thelatter, means for connecting and disconnecting the driving member to andfrom said ratchet wheel shaft, and means for automatically?- movingthel'ever and pawls toanvinoperw pawl for operatin tive position whenthe driving member is connected to said ratchet wheel shaft.

6. The combination of-a drive shaft a driven shaft arallel therewith, aratchet wheel mounte on the driven shaft, a pawl cooperating with saidratchet wheel, mechanism connecting the drive shaft with said thelatter, gearing connecting said sha ts independently of the pawl andratchet, said gearing including a clutch, and meansscperated by theclutch for automatically disconnecting the pawl and ratchet when theclutch is in position to connect'the shafts through said gearing.

7. The combination of a shaft, ratchet wheels mounted thereon, levers,pawls carried by the levers and cooperating with the ratchet wheels, adrive shaft, operatin connections between the drive shaft an saidlevers, means for operating the first-named shaft independently of thepawl and ratchet mechanism, a movable frame, means carried thereby forholdin the pawls in operative position, and mechanism for maintainingsaid frame in position to hold the pawls inoperative during saidindependent operation.

In testimony whereof, I have signed my name to this specification in thepresence of two subscribing witnesses.

AUGUST SUNDH.

Witnesses:

JAMES G. BETHELL, JOHN F. RULE.

